How to keep a Form on top of others in VB.NET?

When we create a Windows application, we want to keep the main form on top of another form. We can also say that when the application starts, a popup window form is displayed on top of the main form within the application to start the further process. In VB6 we can see a Win32API that call SetWindowPos to set the form always on top. And in VB.NET, it is simple to keep a form at the top using the TopMost property of the form as True. After setting the TopMost property to true, the Uppermost form of a Windows application that overlaps all other forms, even if the Uppermost form is not in the active or foreground form.

Furthermore, the TopMost property of the form will force the form to the top layer of the screen when the value of TopMost is true. And the Show() method is used to display the form in Windows Application.

The following syntax is used to set the form on top of others.

Dim f As New Form2
f.TopMost = True
f.Show()

If we want to display a form on top of another form, we have to create two Windows Forms.

MainPage.vb
TopForm.vb

To keep the TopForm.vb Form on top of the MainPage.vb Form, we need to set the TopMost property in the MainPage.vb file to True.

MainPage.vb

Public Class MainPage
    Private Sub MainPage_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Me.Text = "javatpoint.com" 'Set the title for a Window Form 
        Label1.Text = "Student Name"
        Label2.Text = "Roll No."
        Button1.Font = New Font("Microsoft Sans Serif", 12)
        Label3.Text = "Email ID"
        Button1.Font = New Font("Microsoft Sans Serif", 12)
        Label4.Text = "Course"
        Button1.Font = New Font("Microsoft Sans Serif", 12)
        Label5.Text = "Geder"
        Button1.Font = New Font("Microsoft Sans Serif", 12)
        Label6.Text = "Student Registration Details"
        Label6.Font = New Font("Microsoft Sans Serif", 20)  ' Set Font style
        Label6.ForeColor = Color.Red
        RadioButton1.Text = "Male"  ' Set the radiobutton1 and radiobutton2
        RadioButton2.Text = "Female"
        Button1.Text = "Submit"
        Button1.Font = New Font("Microsoft Sans Serif", 10)
        Button1.BackColor = Color.Green
        ' Define the parameter to set the TopForm on top of the MainPage Form.
        Dim frm As New TopForm
        frm.TopMost = True 'Set the TopMost property to True
        frm.Show() 'Show() method is used to display the TopForm
    End Sub
    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Dim name As String
        Dim rollno As String
        Dim email As String
        Dim course As String
        Dim gen As String
        name = TextBox1.Text
        rollno = TextBox2.Text
        email = TextBox3.Text
        course = TextBox4.Text
        If RadioButton1.Checked = True Then
            gen = "Male"
        ElseIf RadioButton2.Checked = True Then
            gen = "Female"
        End If
        ' Display the user details, when the Button1 is clicked
        MsgBox(" Your Name: " & name + vbCrLf + "Your Roll No: " & rollno + vbCrLf +
               "Your Email: " & email + vbCrLf + "Your Course: " & course + vbCrLf + "Your Course: " & gen)
    End Sub
End Class

TopForm.vb

Public Class TopForm
    Private Sub TopForm_Load(sender As Object, e As EventArgs) Handles MyBase.Load

        PictureBox1.BackgroundImage = Image.FromFile("C:\Users\AMIT YADAV\Desktop\JTP.png")
        PictureBox1.SizeMode = PictureBoxSizeMode.StretchImage
    End Sub
End Class

Output:

How to keep a Form on top of others in VB.NET

In the above image, the TopForm is placed at the top of the 'javatppoint.com' (MainPage). If we close the TopForm, it shows the form, shown below.